Adhesive-taping attachment



July 16, 1929. R. E. LEATHERBURY, JR- 1.7215252 ADHESIVE TAPING ATTACHMENT Filed March 30, 1927 Willluv a f v l INVEN'TOR Roerleakerazy Jr.)

` ATTORNEY.-

Patented July 16, 1929.

UNITED STATES ROBERT E. LEATHERBURY, JR., F ST. LOUIS, MISSOURI,

PATENT OFFICE.

ASSIGNOR TO PETERS BROTHERS RUBBER COMPANY, INC., 0F BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

ADHESIVE-TAPING ATTACHMENT.

Appimation meauar'ch so, 1927. serial No. 179,599.

a lower feed dog in the bed, a vertically re-v ciprocatory electrically heated presser-foot and a four motion needle, but the rapid reciprocation of the presser-foot in time injure and disabled the heating means, the needle would get red hot, and it was not possible to view the heated tape or to apply the tape 20 around sharp curves.

One object of the invention is to provide a method and apparatus or device of this kind to overcome the above defects and to prevent the gumming of the tape.

Another object of the invention is to provide an apparatus or device of this kind having large heating surface and which may be run at high speed.

Another object of the invention is to provide an apparatus or device of this kind which does notrequirey any needle or puncturing of the tape.

Other objects of the invention are to improve generally the simplicity and eiiciency of such methods and devices and to provide a device or apparatus of this kind which is rapid, economical, durable and reliable in operation, and economical to manufacture.

Still other objects of the invention will ap- 40 pear as the descri tion proceeds; `and While erein details of t e invention are described and claimed,'the invention is not limited to these, since many and various changes may be made without departing from the scope of .45 the invention as claimed in the broader claims.

The inventive features for the accomplishment of these and other objects are shown herein in connection with an improved tape applyin device which, brieiiy stated, consists of a guie means including a stationary supporting member having a web in the vertical plane of feed of asewing machine and having its front part curved upwardly to provide a heating face, and an upper end in front of the machine bed, said face being heated by a suitable electric heating means.

Thus it is possible to guide the tape continuously along a predetermined path and apply heat to fuse the adhesive as the tape passes and then to apply a work piece/to the fused adhesive while the tape is still moving.

In the accompanying drawing, showing by way of example, one of many possible embodiments of the invention.

Fig. 1 is a side elevation showing the tape guide and heating means, the machine bed being shown in partial section;

Fig. 2 is a fragmental plan guide'means and bed; and

Fig. 3 is a fragmental front elevation.

My invention is here shown in combination with the table 5, and cylinder-bed 6 of a sewing machine having its needle bar re# showing the moved and a lower four motion feed dog 7 in.

the bed', a vertically reciprocatory .presserfoot 8 and a four motion feed foot 9 adapted` to rise and move frontwardly and descend when the presser foot is down and to move back vin feeding direction simultaneously with the feed do when the presser foot is raised. It is noted, owever, that the invention is not lser foot. A guage guidesa work piece under d the footl but above the guide means and tape.

limited to use with this kind of machine as distinguished from other kinds of tape applying means.

An asbestosor other heat insulating pad 10 on said table receives a stationary approximately L-shaped heater support 11 of suitable metal and of L-shaped cross-section having a side web 12, and a supporting web 13, the latter being mounted on said pad on said table on the vertical plane of feed of the sewing machine and having its front part curved upwardly away from the table to form a curved portion having an outer heating face 15 and then extended upwardly to be disposed directly in front of the axis of the bed 6 substantially in contact with the bed.

A heating block 16 of heat of resistant metal mounted fast on the inner face of said curved portion is provided with a longitudinal bore 17 receiving a stationary electric heating unit 18 provided with a flexible cable including conductors 19 to a suitable source of current whereby said unit and heating face may be heated.

The back and upper ends of said web 13 are provided with extensions 20, 21 bent away from said table and bed respectively, said eX- tensions and the lower part of n,said curved port-ion being provided with a transverse upper, rear and intermediate guide slots 22, 23, 24 respectively for the reception of tape 25 from a spool 26 on a support 27 rotatably carrying a spool of tape narrower than said slots are long and having a fusible coating of gutta percha cement or the like on its inner face, said tape being adapted to be passed through said rear slot 22, thence above said supporting web 13, through the intermediate slot 24, and against said heating face 15 with its coated side out, to heat and fuse the cement without gumming it, and then through the upper slot 23.

A bed plate 30 (Fig. 2) mounted on the top I of the cylinder bed 6 tangential thereto and extending to the presser foot and frontwardly from the top of the bed, has a rear extension 31 by which it is secured by a screw 32 to the bed. A guide plate`35 (Figr3) on the front edge of the bed plate is curved upwardly, as at 36, and then toward itself to form a U-shaped end having closely spaced upper and lower members 37, 38 forming a space 39 adapted to receive the tape 25 with the coated side out of Contact with the upper member 37 the curved part 36 serving to guide one edge of the tape, the upper member 37 holding the superposed work iece 40 (Fig. 1) from the cement before t e presser foot is reached. An adjustable gauge plate 42 (Fig. 3 disposed on said guide plate 35 has one en received in said space 39 to engage the other edge of the tape, said gauge and guide plates 42, 35 being provided with the longitudinal slot 43 (Fig. 2) throu h which passes a clamping screw 44 into t e bed plate to hold the plates in adjusted.position for different widths of tape. A work piece gauge 45 comprising a body plate adjustably carried on the bed plate beind and parallel to the guide plate has a post 46 on the end of the body adapted to engage the edge of thework piece 40 to position the latter relative to the tape. A screw and slot means 47, 48 is provided whereby the work piece gauge is adjustable to place the tape and work iece edge in the desired relation.

A s eet of asbestos 50 secured on the outer obvious and will be readily understood from the foregoing and need now be only summarized as follows: l

The adhesive tape 25 having the fusible coating on one side only is 4supplied by the spool 26 and guided along a predetermined path determined by the slots 22, 24 23 with the coated side exposed at the heating face 15 vwhere said face, heated by the unit 17 applies heat to the uncoated side of the tape to fuse the adhesive. The tape is then passed through the slot 23 and space 39, with the fused adhesive up, after which the work piece 40 is applied to the. fused adhesive on said coated side. Then the feed dog 9 and presser foot 8 press the tape and piece together and then the feed dog and feed foot 9 draw them along said path in the feeding direction.

vI claim as my invention:

1. In combination, a stationary supporting web having a curved portion provided with a heating face, and an upper end provided with transverse upper and intermediate gui-de slots respectively on both sides of saidp face; a heating block of heat resistant metal mounted fast on the inner face of said curved portion and provided with a longitudinal bore; an electric heating unit in said bore provided with a cable including conductors to a suitable source of current whereby said unit and heating face may be heated; means supplying coated tape in position to pass through said intermediate slots, and thence against said face and through the upper slot; and guide means to receive the tape from the upper slot and guideit to a tape feeding and pressing means.

2. In combination, a table, a tape feeding and applying means thereon; a stationary approximately L-shaped heater support of suitable metal and of L-shaped cross-section having a side web and a supporting web, the

`latter being mounted on said table in the vertical plane of feed of the feeding means and having` its front part curved upwardly from the table to form a curved portion having an outer heating face and then extended upwardly to be. disposed in front of the feeding and applying means; the back and upper ends of said web being provided with extensions bent vaway from said table and bed respectively,

said extensions and the lower part of said curved poertion being provided with transverse upper, rear and intermediate guideslots respectively; means carrying coated tape in position to pass through said rear and intermediate slots, and thence against said face;A

with its coated side out, and then through 3. In combination, a table; a tapefeeding and pressing means thereon; a heat insulating asbestos'pad on said table;a stationary support having a side web and a lower supporting web mounted on said pad and having a heating face, and an'upper end in front of the pressing means 'being provided with transverse upper and intermediate guide slots respectively on both sides of said face; means supplying coated tape in position to pass through said intermediate slot, and thence against said face and through the upper slot; guide means to receive the tape from the upper slot and guide it to the feeding pressing means; a gauge adjustable to place the tape and work piece edge in the desired relation a sheet of asbestos secured on the'outerv face of the side web; and a shield plate comprising a bracket portion secured to the face of the asbestos sheet and a shield portion disposed in front of the support to protect the operator against accidental contact with the heated parts. t

4. An attachment for a sewing machine, having a cylinder bed and a table comprising meansfor guiding coated tape to the machine With coated side uppermost, said guiding means including an outwardly curved -portion heated on its inner side for heating said tape; an adjustable guide means on thevbed having closely spaced upper and lower members forming a space adapted to receive the tape before the presser-foot is reached; andv an adjustable gauge mounted to engage the edge of the work piece disposed above the tape and upper member. i

5. An attachment for a sewing machine, comprising a stationary supporting web in the vertical plane of feed and having its front part curved upwardly to provide a heating face, and an upper end in front of the machine bed; a heating'means for said face; the ends of said web and the lower part of said curved portion being provided with a trans- Vverse upper, rear and intermediate guide slots respectively; a spool support for vrotatably carrying a spool of tape narrower than the slots are long and having a 'fusiblegutta percha' cement or the like on its inner face, said tape being adapted to be passed through said rear slot, thence 'above said supporting web, through the intermediate slot against said heating face with its coated ,side out to fuse the cement without gumming it and then through the upper slot; and guide means on t-hezhe" to receive the tape and guide it to the presser-foot.

6. In combination, a heater; means for gui-ding coated tape against said heater and comprising an upper slot for guiding the tape from the heater; a cylinder-bed sewlng machine having the needle removed; a bed plate mounted on the top of the cylinder bed tanlgential thereto and extending to the presser foot and -frontwardly from the -top .of the bed and having a rear extension by which it is secured by a screw to the bed; a guide plate on the front edge of the bed plate and curved upwardly and then toward itself to form a U-shaped end having closely spaced upper and lower members forming a space adapted to receive the tape with the coated side out of contact 'with the upper member and to draw the coated side from contact with the upper edge of the upper slot, the curved part serving to guide one edge of the tape, the upper member holding the superposed work piece from the coating before the presser foot I is reached; andan adjustable gauge plate disposed on said guide plate and having one end received in said space to engage the other edge of the tape.

-7. An attachment fora sewing machine comprising an outwardly curved heater por? tion; means for` guiding coated tape against said heater portion and thence to the machine; a bed plate mounted on the machine bed; an adjustable guide plate on the bed plate having closely spaced upper and lower members forming a space adapted to receive the tape before the presser foot is reached; a work piece gauge mounted yto engage the edge of the Work piece; comprising a body plate adjustably' carried on the bed plate behind and parallel to the guide plate, and a post on .the end of the body adapted to engage the work plece.

comprising a stationary supporting web in the vertical plane of feed and having its front part curved lupwardly to provide a heating face, and an uper end in front of the machine bed; a heating means for said face; the ends of said web and the lower part of said curved 8. An attachment forv a sewing machine portion being provided witha transverse upper, rear and intermediate guide slots res ectively; means carrying coated tape 1n posltion to pass through sa1d rear and lntermediate slots, and thence agalnst sald face with` its coated side out, and then through the upper slot; guide means o n the bed to receive the tape and guide it-tothe presser foot; and a gauge to guide a work piece above the guide means and tape.

9. In a device of the character described, the combination with means for moving a tape adapted to be rendered adhesive by heating lengthwise of itself, of means for guiding the tape when moved by said means,

saidmeans for guiding thetape including a heated portion thereof constituting a heating face for contact of themoving tape therewith for rendering said tape adhesive.

10. In a device ofthe character described the combination with means for moving a tape adapted to be rendered adhesive by Y heating ,lengthwise of itself, of `means for guiding the tape when moved by said means, said means for guiding the tape including an outwardly curved portion heated on its inner side, said tape contact-ing with the outer side of said portion and heated thereby for rendering the tape adhesive.

11. In a device of the character described the combination with means aippurtenant to sewing machine mechanism or moving a tape adapted to be rendered adhesive by heating, lengthwise of itself,`of means for guiding the tape when moved by said means, said means for guiding the tape including a portion having an outer convex side and an inner concave side and having heating means disposed on said inner side whereby said outer side is heated, said tape when moved contacting with lsaid outer convex side and heated and rendered adhesive by contact therewith.

12. In a device of the character described, the combination with means for moving` a tape adapted to be rendered adhesive by heating lengthwise of itself, of a guide member having a straight portion free at one of its ends joining. an outwardly curved portion having a free end and a side web along said portions, said side web at the free end of said straight portion having a transversely slotted inturned end and having at the free end of said curved portion a transversely slotted out-turned end and having an intermediate transverse slot at about the joining of said portions, said curved portion being heated on its 'inner side, said tape whenmoved passing through said slot at the free end of said straight portion on the inner side of the web and thence through said intermediate slot to the outer .Side of said web and contacting with the outer' side of said curved portion for receiving heat therefrom and thencepassing through the slot of the web at the free end of said 4tzurved portion to the rst mentioned side of the web.

13. In a device of the character described,

the combination with the work table of sewing machine mechanism, the pressure foot and means for moving the work 4to said'table, of means for supplying tape adapted to be rendered adhesive by heat, guiding means `consisting of a guide member having a the tape passing from said means for supply 'through said slot at the free end of said straight portion on the inner side of said web and thence through said intermediate slot to the outer side of, the web and contacting with the outer side of said curved portion for receiving heat therefrom and vthence passing through the slot of the web at the free end a of said curved portion to the first mentioned side of the web, and means for guiding the web to said presser foot in a plane parallel to land under the plane of the work moved from said table for pressure of the work by said presser foot upon said tape for securing to gether said work and tape. A

Signed at 160 John St., Brooklyn, N. Y., in the county of Kings and State of New York, this 15th day of March, A. D. 1927.

.ROBERT E. LEATHERBURY, JR. 

